Fabricated light truss floor slab and welding machining device thereof

Abstract

The invention relates to the technical field of constructional engineering, and discloses an assembly type light truss floor which comprises a plurality of space trusses and further comprises a bottom plate, the bottoms of the space trusses are arranged in the bottom plate, a reinforcing mesh is arranged in the bottom plate, the bottoms of the space trusses are connected with the reinforcing mesh, and a filling layer is arranged between the space trusses and the bottom plate. The welding machining device is used for machining the assembly type light truss floor slab, the self weight is low, the on-site installation steps are simple, pipelines can be conveniently laid in the assembly type light truss floor slab, factory prefabrication production can be facilitated, and the machining efficiency and the using effect of the truss floor slab are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to an assembled lightweight truss floor and a welding processing device thereof. Background Art

[0002] With the rapid development of building industrialization in my country, prefabricated floor slabs are gaining increasing recognition within the industry. Traditional prefabricated floor slabs primarily fall into two categories: First, steel truss floor slabs. These trusses, formed by resistance spot welding of steel bars as upper and lower chords and webs, are known as steel trusses. The steel truss floor slabs are also known as steel truss floor slabs, which are combined with the base plate and joined together via resistance spot welding to form a single load-bearing structure. Second, steel-framed lightweight slabs are primarily constructed with a lightweight steel frame, cold-drawn steel wire mesh, a modified cement-perlite composite core, and a permeability- and wear-resistant coating.

[0003] For example, the Chinese invention patent application with application number 201910725793.6 discloses an assembled two-way reinforced truss floor, including two groups of plane reinforced trusses and a bottom formwork or a bottom precast concrete floor, each group of plane reinforced trusses is mainly composed of a plurality of reinforced trusses arranged in parallel and spaced apart, and both ends of each reinforced truss of the two groups of plane reinforced trusses are carried / connected to a steel beam / concrete beam; each reinforced truss is mainly composed of an upper chord steel bar, a lower chord steel bar, a web steel bar and a support steel bar, the upper chord steel bar and the lower chord steel bar are respectively arranged parallel to each other, and the upper chord steel bar and the lower chord steel bar are welded together by continuous wavy web steel bars to form a single piece of steel bar. Truss; the outer side surfaces at the inflection points of the wavy web reinforcement are alternately welded and fixed to the upper chord reinforcement / lower chord reinforcement as a whole, and both ends of the upper chord reinforcement and the lower chord reinforcement are welded to a support reinforcement. The support reinforcement is located in the vertical plane where the web of the steel beam is located, and the lower end of the support reinforcement extends over the lower chord reinforcement and is fixed to the upper surface of the upper flange of the steel beam / concrete beam; two groups of plane reinforcement trusses are cross-arranged vertically to form a two-way reinforcement truss, and the upper and lower chord reinforcements in the reinforcement trusses of one group of plane reinforcement trusses are arranged between the upper and lower chord reinforcements in the reinforcement trusses of the other group of plane reinforcement trusses, and the upper and lower chord reinforcements of the two groups of plane reinforcement trusses are welded and connected at their respective vertical intersection points.

[0004] There are at least the following problems in the above patents and existing technologies: First, the steel truss floor slabs need to be supported, reinforced and poured on site, which has high labor costs and heavy floor slabs; second, although the steel frame lightweight slabs are light in weight, the floor slabs are made of C-shaped steel or H-shaped steel with a variety of cross-sections, the bottom of the slabs are uneven and it is impossible to pass pipelines inside the slabs. The floor slabs are all one-way slabs and the overall floor slab thickness is large. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention develops an assembled lightweight truss floor and its welding processing device. The present invention has low dead weight, simple on-site installation steps, convenient internal pipeline laying, and convenient factory prefabrication, effectively improving the processing efficiency and use effect of the truss floor.

[0006] The technical solution to the technical problem solved by the present invention is as follows: on the one hand, an embodiment of the present invention provides an assembled lightweight truss floor, comprising several groups of spatial trusses and a bottom plate, the bottom of the spatial truss being arranged in the bottom plate, a steel mesh being provided in the bottom plate, the bottom of the spatial truss being connected to the steel mesh, a filling layer being provided between the spatial truss and the bottom plate, and two adjacent groups of spatial trusses being connected to each other through several groups of nodes.

[0007] As an optimization, the spatial truss comprises several groups of full-length trusses and several groups of segmented trusses, with adjacent groups of full-length trusses connected by several groups of segmented trusses. This arrangement of full-length trusses and segmented trusses facilitates production and welding of the spatial truss. The segmented trusses also enhance the overall strength of the spatial truss.

[0008] As an optimization, the full-length truss includes a first upper chord angle steel, a first web reinforcement, and a first lower chord angle steel. The first upper chord angle steel and the first lower chord angle steel are both unequal-leg angle steels. The two ends of the first web reinforcement are connected to the short sides of the first upper chord angle steel and the first lower chord angle steel, respectively, and the bottom of the long side of the first lower chord angle steel is connected to the steel mesh. By providing the first upper chord angle steel and the first lower chord angle steel, the load can be borne; by providing the first web reinforcement, the bending moment generated by the inter-node load can be reduced; by connecting the bottom of the long side of the first lower chord angle steel to the steel mesh, the contact area with the steel mesh can be increased, facilitating welding; secondly, the connection strength with the base plate can be enhanced; and thirdly, the flatness of the top of the base plate can be improved, reducing the height of the short side of the first lower chord angle steel exposed to the base plate.

[0009] As an optimization, the segmented truss includes a second upper chord angle steel, a second web reinforcement, and a second lower chord angle steel. Both the second upper chord angle steel and the second lower chord angle steel are unequal-leg angle steels. The two ends of the second web reinforcement are connected to the short sides of the second upper chord angle steel and the second lower chord angle steel, respectively. The bottom of the long side of the second lower chord angle steel is connected to the steel mesh. By providing the second upper chord angle steel and the second lower chord angle steel, the load can be borne; by providing the second web reinforcement, the bending moment generated by the inter-node load can be reduced; by connecting the bottom of the long side of the second lower chord angle steel to the steel mesh, the contact area with the steel mesh can be increased, making welding easier; the connection strength with the base plate can be enhanced; and the flatness of the top of the base plate can be improved, reducing the height of the short side of the second lower chord angle steel exposed to the base plate.

[0010] As an optimization, the infill layer is made of lightweight foamed concrete, polyurethane foam, or polystyrene particles, with a top plate placed on top. This lightweight infill layer reduces the overall weight of the floor slab, while the top plate protects the infill layer in conjunction with the bottom plate.

[0011] As an optimization, the node consists of two sets of primary angle steel and one set of secondary angle steel. The two sets of primary angle steel are mounted on two corresponding sets of space trusses, and the ends of the secondary angle steel are bolted or welded to the two sets of primary angle steel. This fully bolted connection facilitates construction and installation, and the welded connection has high strength and can be mechanized.

[0012] On the other hand, an embodiment of the present invention provides a welding processing device for processing the above-mentioned prefabricated lightweight truss floor, including a conveyor, two sets of gantry supports are provided on the conveyor, the bottom of the two sets of gantry support cross bars are provided with telescopic devices, the inner sides of the two sets of gantry support vertical bars are provided with limiting slides along the height direction, the output ends of the two sets of telescopic devices are provided with mounting rods, the two ends of the two sets of mounting rods are respectively slidably set in the two sets of limiting slides through sliders, several sets of pressure wheels are provided at the bottom of the mounting rod near the feeding end of the conveyor, and several sets of welding guns are provided at the bottom of the mounting rod near the unloading end of the conveyor.

[0013] As an optimization, a guide plate is installed on the frame at the feed end of the conveyor. The guide plate consists of an inclined section and a horizontal section, with several sets of guide wheels on the horizontal section. The inclined section facilitates the sliding of the space truss and steel mesh into the conveyor, while the horizontal section and guide wheels can laterally limit the space truss, ensuring that it is conveyed along the preset path and that the full-length truss and steel mesh are aligned with the pressure wheels and welding gun.

[0014] As an optimization, the conveyor is any one of a roller conveyor, a belt conveyor or a chain conveyor, and the telescopic device is any one of a pneumatic cylinder, an electric cylinder or a hydraulic cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By setting up space trusses, the skeleton of the floor slab can be formed to ensure the overall strength of the floor slab; by setting up a bottom plate, the space trusses and the filling layer can be supported. After being connected with the space trusses, the overall strength of the floor slab can be enhanced, and the bottom of the space truss can be made flat, thereby facilitating the passage of pipelines inside the plate; by setting up a steel mesh, it can become the skeleton of the bottom plate, enhance the strength of the bottom plate, and enhance the connection strength between the bottom plate and the space truss; by setting up a filling layer, the space truss can be filled to form a complete floor slab; by setting up nodes, the one-way plate can be formed into an integral two-way load-bearing floor slab, without the need to increase the load-bearing steel bars, and the thickness of the floor slab is small.

[0017] By setting up a conveyor, the space truss and steel mesh can be transported, so that the welding gun can weld the steel mesh to the space truss; by setting up a gantry bracket, a telescopic device and a mounting rod, the pressure wheel or the welding gun can be raised and lowered; by setting up a limiting slide and a slider, the mounting rod can be stably raised and lowered along the limiting slide without deviation under the drive of the telescopic device; by setting up a pressure wheel, the steel mesh can be pressed tightly onto the space truss, which is convenient for welding; by setting up a welding gun, the steel mesh can be welded to the space truss with high welding precision, which greatly facilitates the factory prefabrication production and effectively improves the processing efficiency and use effect of the truss floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the assembled lightweight truss floor of the present invention.

[0019] Figure 2 This is a schematic diagram of the space truss in the first embodiment of the prefabricated lightweight truss floor of the present invention.

[0020] Figure 3 for Figure 2 A partial enlarged view of area A in the middle.

[0021] Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the assembled lightweight truss floor of the present invention.

[0022] Figure 5 It is a top view of the assembled lightweight truss floor welding processing device of the present invention.

[0023] Figure 6 This is a front view of the assembled lightweight truss floor welding processing device of the present invention.

[0024] Figure 7 This is a schematic diagram of the gantry support and pressure wheel in the assembled lightweight truss floor welding processing device of the present invention.

[0025] Figure 8 This is a schematic diagram of the gantry support and welding gun in the assembled lightweight truss floor welding processing device of the present invention.

[0026] In the figure: 1. Space truss; 2. Bottom plate; 3. Steel mesh; 4. Filling layer; 5. Node; 6. Full-length truss; 7. Segmented truss; 8. First upper chord angle steel; 9. First web reinforcement; 10. First lower chord angle steel; 11. Second upper chord angle steel; 12. Second web reinforcement; 13. Second lower chord angle steel; 14. Top plate; 15. First angle steel; 16. Second angle steel; 17. Conveyor; 18. Gantry bracket; 19. Telescopic device; 20. Limiting slide; 21. Mounting rod; 22. Slider; 23. Pressure wheel; 24. Welding gun; 25. Guide plate; 26. Guide wheel. DETAILED DESCRIPTION

[0027] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0028] Example 1

[0029] Figures 1 to 3 This is an embodiment of the assembled lightweight truss floor of the present invention, such as Figures 1 to 3 As shown, an assembled lightweight truss floor includes several groups of space trusses 1 and a base plate 2. The base plate 2 is fiber concrete or high-ductility fiber reinforced cement-based composite material. The bottom of the space truss 1 is arranged in the base plate 2. A steel mesh 3 is provided in the base plate 2. The bottom of the space truss 1 is connected to the steel mesh 3. A filling layer 4 is provided between the space truss 1 and the base plate 2. Two adjacent groups of space trusses 1 are connected to each other through several groups of nodes 5.

[0030] By setting up the space truss 1, the skeleton of the floor slab can be formed to ensure the overall strength of the floor slab; by setting up the bottom plate 2, the space truss 1 and the filling layer 4 can be supported. After being connected with the space truss 1, the overall strength of the floor slab can be enhanced, and the bottom of the space truss 1 can be made flat, thereby facilitating the passage of pipelines in the plate; by setting up the steel mesh 3, it can become the skeleton of the bottom plate 2, enhance the strength of the bottom plate 2, and enhance the connection strength between the bottom plate 2 and the space truss 1; by setting up the filling layer 4, the space truss 1 can be filled to form a complete floor slab; by setting up the node 5, the one-way plate can be formed into an integral two-way load-bearing floor slab, without the need to increase the load-bearing steel bars, and the thickness of the floor slab is small.

[0031] like Figure 2 and Figure 3 As shown, the spatial truss 1 includes several groups of full-length trusses 6 and several groups of segmented trusses 7. Two adjacent groups of full-length trusses 6 are connected by several groups of segmented trusses 7. The provision of the full-length trusses 6 and the segmented trusses 7 facilitates production and welding to form the spatial truss 1. The provision of the segmented trusses 7 also enhances the overall strength of the spatial truss 1.

[0032] like Figure 2As shown, the full-length truss 6 includes a first upper chord angle steel 8, a first web reinforcement 9, and a first lower chord angle steel 10. The first upper chord angle steel 8 and the first lower chord angle steel 10 are both unequal-legged angle steels. The first web reinforcement 9 is a round steel or steel plate. The two ends of the first web reinforcement 9 are connected to the short sides of the first upper chord angle steel 8 and the first lower chord angle steel 10, respectively. The bottom of the long side of the first lower chord angle steel 10 is connected to the steel mesh 3. By providing the first upper chord angle steel 8 and the first lower chord angle steel 10, the load can be borne; by providing the first web reinforcement 9, the bending moment generated by the inter-node load can be reduced; by connecting the bottom of the long side of the first lower chord angle steel 10 to the steel mesh 3, the contact area with the steel mesh 3 can be increased to facilitate welding, the connection strength with the base plate 2 can be enhanced, and the flatness of the top of the base plate 2 can be improved, reducing the height of the short side of the first lower chord angle steel 10 exposed from the base plate 2.

[0033] like Figure 2 As shown, the segmented truss 7 includes a second upper chord angle steel 11, a second web reinforcement 12, and a second lower chord angle steel 13. The second upper chord angle steel 11 and the second lower chord angle steel 13 are both unequal-legged angle steels. The second web reinforcement 12 is made of round steel or steel plate. The two ends of the second web reinforcement 12 are respectively connected to the short sides of the second upper chord angle steel 11 and the second lower chord angle steel 13. The bottom of the long side of the second lower chord angle steel 13 is connected to the steel mesh 3. The provision of the second upper chord angle steel 11 and the second lower chord angle steel 13 allows the truss to withstand loads. The provision of the second web reinforcement 12 reduces the bending moment generated by inter-node loads. The connection of the bottom of the long side of the second lower chord angle steel 13 to the steel mesh 3 increases the contact area with the steel mesh 3, facilitating welding. It also enhances the connection strength with the base plate 2. It also improves the flatness of the top of the base plate 2 and reduces the height of the short side of the second lower chord angle steel 13 exposed from the base plate 2.

[0034] like Figure 2 and Figure 3 As shown, the node 5 includes two sets of first angle steels 15 and one set of second angle steels 16. The two sets of first angle steels 15 are respectively installed on the two sets of space trusses 1. The ends of the second angle steels 16 are bolted or welded to the two sets of first angle steels 15. The fully bolted connection facilitates construction and installation, and the welded connection has high strength and can be mechanized.

[0035] Example 2

[0036] Figure 4 This is the second embodiment of the prefabricated lightweight truss floor of the present invention. It differs from the first embodiment in that the infill layer 4 is made of any of lightweight foamed concrete, polyurethane foam, or polystyrene particles, and a top plate 14 is provided on top of the infill layer 4. Using a lightweight infill layer 4 reduces the overall weight of the floor; the top plate 14 cooperates with the bottom plate 2 to protect the infill layer 4 within.

[0037] like Figures 5 to 8As shown, the present invention also provides a welding processing device for processing the assembled lightweight truss floor, including a conveyor 17, and two groups of gantry supports 18 are provided on the conveyor 17. The bottom of the cross bars of the two groups of gantry supports 18 are provided with telescopic devices 19, and the inner sides of the vertical bars of the two groups of gantry supports 18 are provided with limiting slides 20 along the height direction. The output ends of the two groups of telescopic devices 19 are provided with mounting rods 21, and the mounting rods 21 are rigid metal rods. The two ends of the two groups of mounting rods 21 are slidably arranged in the two groups of limiting slides 20 through sliders 22 respectively. Three groups of pressure wheels 23 are provided at the bottom of the mounting rod 21 near the feeding end of the conveyor 17. The pressure wheels 23 are made of rubber or PU material, and three groups of welding guns 24 are provided at the bottom of the mounting rod 21 near the unloading end of the conveyor 17. That is, according to the actual welding processing situation, the number of pressure wheels 23 and the number of welding guns 24 need to be the same as the number of groups of the full-length trusses 6.

[0038] By setting up a conveyor 17, the space truss 1 and the steel mesh 3 can be transported, so that the welding gun 24 can weld the steel mesh 3 to the space truss 1; by setting up a gantry bracket 18, a telescopic device 19 and a mounting rod 21, the pressure wheel 23 or the welding gun 24 can be raised and lowered; by setting up a limiting slide 20 and a slider 22, the mounting rod 21 can be stably raised and lowered along the limiting slide 20 under the drive of the telescopic device 19 without deviation; by setting up a pressure wheel 23, the steel mesh 3 can be pressed tightly onto the space truss 1, which is convenient for welding; by setting up a welding gun 24, the steel mesh 3 can be welded to the space truss 1.

[0039] like Figure 5 and Figure 6 As shown, the frame at the feeding end of conveyor 17 is equipped with a guide plate 25. The guide plate 25 includes an inclined section and a horizontal section. The angle between the inclined section and the conveying direction of conveyor 17 is 30 degrees. The horizontal section is equipped with several sets of guide wheels 26, which cooperate with the side walls of the first upper chord angle steel 8. The inclined section facilitates the sliding of the spatial truss 1 and the steel mesh 3 onto conveyor 17. The horizontal section and guide wheels 26 can laterally limit the spatial truss 1, ensuring that it is conveyed along a predetermined path, so that the full-length truss 6 and steel mesh 3 correspond to the pressure wheel 23 and welding gun 24.

[0040] The conveyor 17 can adopt a DTⅡ type roller conveyor with a roller diameter of 89 mm, a spacing of 300 mm, and an adjustable conveying speed of 0.5 to 1 m / min. The telescopic device 19 adopts a Festo ESBF-40-100-50P electric cylinder with a stroke of 100 mm, a positioning accuracy of ±0.1 mm, and a thrust of 500 N. The welding gun 24 can adopt a Lincoln Electric PowerWave S350 metal electrode gas shielded welding gun with an adjustable welding current of 150 to 300 A.

[0041] During prefabrication in the factory, the staff first puts the steel mesh 3 on the bottom of the space truss 1, aligns the longitudinal steel bars on the steel mesh 3 with the first lower chord angle steel 10 of the full-length truss 6, and facilitates subsequent welding, and then spot welds the steel mesh 3 on the four corners of the space truss 1 for preliminary positioning; then puts the bottom of the space truss 1 upward on the feeding end of the conveyor 17, aligns the guide plate 25, and makes the space truss 1 pass through the inclined section into the horizontal section. The staff starts the conveyor 17 through the PLC controller. The PLC controller can adopt the Siemens S7-1214CDC / DC / DC model, which can simultaneously support pulse output control of the electric cylinder and the conveyor 17, and has flexible programming; as the conveyor 17 runs, the space truss 1 can enter the conveyor 17 under the action of the guide wheel 26; at this time, the first lower chord angle steel 10 of the full-length truss 6, a group of longitudinal steel bars of the steel mesh 3, the pressure wheel 23 and the welding gun 24 are located in the same plane, with a deviation of ≤2mm;

[0042] As the conveyor 17 runs, the space truss 1 and the steel mesh 3 are transported to the bottom of the pressure wheel 23. At this time, the staff starts the telescopic device 19 controlling the pressure wheel 23 through the PLC controller, and the output end extends downward to press the pressure wheel 23. The pressure wheel 23 keeps in contact with the steel mesh 3 with a pressure of 8N. Since the steel mesh 3 at the four corners of the space truss 1 have been spot welded, the steel mesh 3 between the welding point and the pressure wheel 23 can be pressed tightly on the first lower chord angle steel 10; as the conveyor 17 runs, the space truss 1 and the steel mesh 3 are transported to the bottom of the welding gun 24. At this time, the staff starts the telescopic device 19 controlling the welding gun 24 through the PLC controller, and the output end extends downward to press the welding gun 24. The welding gun 24 drops to 3mm from the welding point, and spot welds the longitudinal steel bars and the first lower chord angle steel 10 abutting against the first lower chord angle steel 10 using carbon dioxide gas shielded welding (gas flow rate 15L / min). The spot welding current is 200A, and the welding spot spacing is preset to 400mm. The welding spot spacing can be controlled by PLC programming. After the spot welding is completed, the output end retracts upward. After the conveyor 17 runs 400mm, the PLC controller automatically controls the telescopic device 19 of the welding gun 24 to work again, so that the welding gun 24 spot welds again, and repeats the spot welding process until the space truss 1 and the steel mesh 3 are welded. The welded welds are evenly distributed, the welding position deviation is small, the welding processing accuracy is high, and the overall welding efficiency is high. After the welding of the space truss 1 and the steel mesh 3 is completed, the bottom plate 2 is cast at the bottom of the space truss 1 so that the bottom plate 2 wraps the long sides of the first lower chord angle steel 10, the second lower chord angle steel 13 and the steel mesh 3. The thickness of the bottom plate 2 is 20mm~30mm, which can be prefabricated according to construction requirements. The width of the bottom plate 2 can be 600mm~2400mm according to actual needs. After the bottom plate 2 is formed, it can be transported to the site for installation.

[0043] During on-site construction, two adjacent sets of space trusses 1 are connected through nodes 5 to form an integral bidirectional load-bearing plate. After being hoisted onto the steel beam, the nodes 5 are connected to the steel beam via bolts. Workers can then lay pipelines on top of the bottom plate 2 and then cast the filling layer 4 using the bottom plate 2 as a bottom form. When the filling layer 4 is a material with a certain compressive strength, such as foamed concrete, a top plate 14 may not be provided. When the filling layer 4 is any one of lightweight foamed concrete, polyurethane foam, or polystyrene particles, a separate top plate 14 is required on top of the filling layer 4. The present invention has low deadweight, simple on-site installation steps, facilitates internal pipeline laying, and facilitates factory prefabrication, effectively improving the processing efficiency and use effect of the truss floor.

[0044] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. An assembled lightweight truss floor, comprising a plurality of sets of space trusses (1), characterized by: The invention also includes a bottom plate (2), the bottom of the spatial truss (1) is arranged in the bottom plate (2), a steel mesh (3) is provided in the bottom plate (2), the bottom of the spatial truss (1) is connected to the steel mesh (3), a filling layer (4) is provided between the spatial truss (1) and the bottom plate (2), and two adjacent groups of spatial trusses (1) are connected to each other through a plurality of groups of nodes (5).

2. The assembled lightweight truss floor according to claim 1 is characterized in that: The truss (1) comprises a plurality of groups of full-length trusses (6) and a plurality of groups of segmented trusses (7), and two adjacent groups of full-length trusses (6) are connected via the plurality of groups of segmented trusses (7).

3. The assembled lightweight truss floor according to claim 2 is characterized by: The full-length truss (6) comprises a first upper chord angle steel (8), a first web reinforcement (9) and a first lower chord angle steel (10), wherein the first upper chord angle steel (8) and the first lower chord angle steel (10) are both unequal-leg angle steels, and the two ends of the first web reinforcement (9) are respectively connected to the short sides of the first upper chord angle steel (8) and the first lower chord angle steel (10), and the bottom of the long side of the first lower chord angle steel (10) is connected to the steel mesh (3).

4. The assembled lightweight truss floor according to claim 2 is characterized by: The segmented truss (7) comprises a second upper chord angle steel (11), a second web reinforcement (12) and a second lower chord angle steel (13); the second upper chord angle steel (11) and the second lower chord angle steel (13) are both unequal-leg angle steels; the two ends of the second web reinforcement (12) are respectively connected to the short sides of the second upper chord angle steel (11) and the second lower chord angle steel (13); and the bottom of the long side of the second lower chord angle steel (13) is connected to the steel mesh (3).

5. The assembled lightweight truss floor according to claim 1 is characterized by: The filling layer (4) is any one of lightweight foamed concrete, polyurethane foam or polystyrene particles, and a top plate (14) is provided on the top of the filling layer (4).

6. The assembled lightweight truss floor according to claim 1 is characterized by: The node (5) comprises two groups of first angle steels (15) and one group of second angle steels (16). The two groups of first angle steels (15) are respectively arranged on the two groups of space trusses (1). The two ends of the second angle steels (16) are respectively bolted or welded to the two groups of first angle steels (15).

7. A welding processing device for processing the assembled lightweight truss floor according to claim 1, characterized in that: The invention comprises a conveyor (17), wherein two groups of gantry supports (18) are provided on the conveyor (17), the bottoms of the horizontal bars of the two groups of gantry supports (18) are provided with telescopic devices (19), the inner sides of the vertical bars of the two groups of gantry supports (18) are provided with limiting slide grooves (20) along the height direction, the output ends of the two groups of telescopic devices (19) are provided with mounting rods (21), the two ends of the two groups of mounting rods (21) are respectively slidably arranged in the two groups of limiting slide grooves (20) through sliders (22), the bottom of the mounting rod (21) near the feeding end of the conveyor (17) is provided with a plurality of groups of pressure wheels (23), and the bottom of the mounting rod (21) near the unloading end of the conveyor (17) is provided with a plurality of groups of welding guns (24).

8. The welding processing device according to claim 7, characterized in that: A material guide plate (25) is provided on the frame at the feeding end of the conveyor (17). The material guide plate (25) comprises an inclined section and a horizontal section. The horizontal section is provided with a plurality of guide wheels (26).

9. The welding processing device according to claim 7, characterized in that: The conveyor (17) is any one of a roller conveyor, a belt conveyor or a chain conveyor, and the telescopic device (19) is any one of an air cylinder, an electric cylinder or a hydraulic cylinder.

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